Combination coal and wood heating-stove.



L. HOWARD. COMBINATION OOAL AND WOOD HEATING STOVE. APPLIOAT ION rum)APR.13, 11112.

1,035,589. Patented Aug. 13,1912.

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WITNESSES I & |NVENTQR" ah MW M 3 By m MM. W -H I ATTORNEY .coLuMBIAPLANODRAPH c0 WASHINGTON. D. c.

UNITED STATES PfkTENT OFFICE.

LINCOLN HOWARD, OF RALST'ON, NEBRASKA.

COMBINATION COAL AND WOOD HEATING-STOVE.

To all whom it may concern:

Be it known that I, LINCOLN HOWARD, a citizen of the United States ofAmerica, residing at Ralston, in the county of Douglas and State ofNebraska, have invented certain new and useful Improvements inCombination Coal and Wood Heating- Stoves, of which the following is aspecification.

The object of my invention is to provide a heating stove in which eitherwood or coal can. be used of the class shown in Patent No. 993,300, uponwhich Letters Patent were issued to me May 23, 1911, my improved stovebeing so constructed that I secure a greater degree of heat from it on adecreased quantity of fuel than from said patented stove or from anyother stove of which I have any knowledge.

I accomplish my object by the construction shown in the accompanyingdrawings in which Figure 1 is a longitudinal sectional elevation of thestove, the base fire pot and drum broken away to show the interiorarrangement; Fig. 2 is a top view of the fire pot grate frame, thegrates and flat-flanged cast-- ings in each side of the fire pot formingair passage down the inside of the fire pot into the ash pit or base ofthe stove, and Fig. 3 is a detail top View of the grate frame showingincuts therein.

Similar letters refer to similar parts in the several views, A being thebase of the stove and A a fire pot cast in an inverted conical shape toassist in radiating heat to the floor.

B B are upright flat castings spaced from the inside of the sides offire pot A, the outwardly flanged edges I) b of said castings beingseated against said sides of the fire pot. Said castings are securelyattached, are open at both top and bottom, are preferably somewhatlarger at their tops than at their bottoms and form air passages forpart of the air from the draft passage down into the base of the stove.

D is the grate frame and (Z (Z incuts in each side of the same to allowthe lower end of castings B B to pass through and slightly below thegrate frame into the base of the stove. D D are grates in said grateframe.

The sheet iron body E of the stove is, preferably, joined to the top ofthe fire pot as shown in Fig. 1 at e.

F is a casting which forms an inner wall Specification of LettersPatent.

Application filed April 13, 1912.

Patented Aug. 13, 1912.

Serial No. 690.602.

of a draft passage through which cold air, entering the stove at draftF, is heated while passing around to the sides and rear of the stove,part of said air passing through ports h it into the preheated airpassages formed by castings B B and thence downthrough said incuts (Z (Zin grate frame D into the base of the stoveunder the grates to supplythe grates with draft while the greater part of said preheated airpasses on back to the rear of the stove and through ports 7 i into thecombustion chamber above the fire. The special object of casting F is toconduct the cold air entering the stove at said draft F around the stovethe longest possible circuit so that it will be heated to the highestdegree possible before being admitted either to the grates or combustionchamber. Said casting F is seated in the upper edge of the fire pot andis usually composed of two or more sections and is preferably corrugatedexcept at the edges where it joins the sheet iron body and the fire potof the stove. The upper edge of said casting lies flat against saidsheet iron body. The purpose in casting it corrugated is to secure bothgreater strength and heating surface.

I is an incurve extending horizontally around casting F; the rearsection of said casting is provided with a seat J in said curve I tosupport a batlle plate K. The rear section of casting F is provided withports below the incurved line I to admit preheated air from the draftpassage to the combustion chamber under battle plate K and the two sidesections of casting F are provided with ports h it through which thepreheated air is admitted into the air passages at sides of the stoveand conducted down through the grate frame to the base of the stove. Theair admitted through draft F, passes through said incurved draft passageand becomes highly heated in passing around to the sides and rear of thestove, the larger part passing on to the rear of the stove and thencethrough a plurality of ports f f in the lower part of casting F into thecombustion chamber under baffle plate K where it is forced to minglewith and burn the gases and smoke coked out of the fuel, while a smallerpart passes down through ports h h in the lower edge of the casting F atthe sides of the fire pot to the base of the stove where it is drawn upthrough the grates to start the fire and keep up the coke and gas makingprocess. Casting F is kept at a high temperature by means of a hot blastfrom the rear of the stove under said baffle plate K and the temperatureof the air While passing it c0ntinues to increase. The volume of airpassing through said draft passage is greatly expanded by its rise intemperature and rushes into the combustion chamber with great force. Bymeans of the baffle plate K this preheated air is deflected toward thefire and forced to mingle with the combustible smoke and gases arisingfrom the fuel. That part of the preheated air passing down into the baseof the stove under the grates is only sufficient to keep the fire aliveand keep up the coking and gas making process.

lVhat I claim and desire to secure by Letters Patent is,

1. The combination in a wood and coal heating stove with a base, a bodyportion, a

fire pot of inverted conical shape spaced from the body, a draft and acorrugated incurved casting forming the inner wall and provided withports at the rear and sides below the line of the incurve projection ofthe passage for air entering said draft and a baffie plate seated insaid incurve member, of grates and a grate frame supported on said basesaid frame having longitudinal incuts in each side, and flat castingsspaced from the fire pot open at the top and bottom the outwardlyflanged edges thereof seated against the sides of the fire pot, the openbottoms thereof extending into said base through the longitudinal incutsin said grate frame, said flat castings forming air passages for airentering the draft and passing around to the sides of the stove andthrough the side ports near the base of the corrugated casting to passinto the base of the stove.

2. The combination in a wood and coal with incuts in which said flatcastings are seated.

3. In a heating stove of the kind described the combination with thebase, the fire pot and a casting provided with ports at the rear andsides near its bottom, of castings connected with but spaced from theinner sides of the fire pot, open at the top and bot tom and havingconnection with said side ports at the lower edge of the top casting anda grate frame and grates therein sup ported in the top of the base saidframe having an incut on each side to receive and seat the open bottomsof said castings.

i. In a heating stove for wood and coal, a base and a grate frametherein provided with grates the outer sides of said frame havingincuts, a fire pot supported on said base, upright castings theirflanged edges engaging with the sides of said fire pot, the bottomsseated in sald incuts, said upright castings being open from top tobottom and adapted to form passages for preheated air and carry the sameinto the base of the stove.

In testimony whereof I aflix my signature in presence of two witnesses.

LINCOLN HOWARD.

Vitnesses Mnoonn SAUTEE, EDWARD C. SELs.

Copies Commissioner of Patents,

Washington, D. C.

